Net Income Per Share Reconciliation of Weighted Average Common Shares Outstanding (Details) - $ / shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted average shares outstanding (basic) (in shares)	161,715	168,343	162,582	169,109
Impact of common stock equivalents (in shares)	552	825	744	933
Weighted average shares outstanding (diluted) (in shares)	162,267	169,168	163,326	170,042
Basic (in dollars per share)	$ 0.24	$ 0.36	$ 0.40	$ 0.69
Diluted (in dollars per share)	$ 0.24	$ 0.35	$ 0.40	$ 0.68